@just-every/ensemble/dist/utils/event_emitter.js

LLM provider abstraction layer with unified streaming interface

export class EventEmitter {
    events = new Map();
    on(event, listener) {
        if (!this.events.has(event)) {
            this.events.set(event, new Set());
        }
        this.events.get(event).add(listener);
    }
    off(event, listener) {
        const listeners = this.events.get(event);
        if (listeners) {
            listeners.delete(listener);
            if (listeners.size === 0) {
                this.events.delete(event);
            }
        }
    }
    emit(event, ...args) {
        const listeners = this.events.get(event);
        if (listeners) {
            listeners.forEach(listener => {
                try {
                    listener(...args);
                }
                catch (error) {
                    console.error(`Error in event listener for ${event}:`, error);
                }
            });
        }
    }
    removeAllListeners(event) {
        if (event) {
            this.events.delete(event);
        }
        else {
            this.events.clear();
        }
    }
}
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